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Note 14 - Stockholders' Equity (Detail) (USD $) | 1 Months Ended | 10 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Aug. 31, 2010 | Mar. 31, 2010 | Mar. 31, 2009 | Oct. 31, 2008 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Mar. 31, 2011
Stock Repurchase Program, Authorized Amount | $ 5,000,000 |  |  | $ 5,000,000 |  |  |  |
Stock Issued During Period, Shares, Restricted Stock Award, Forfeited (in Shares) |  |  |  |  |  | 395 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares) |  |  |  |  |  | 305,567 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period |  |  |  |  |  | 1 year |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in Shares) |  |  |  |  |  | 283,367 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term |  |  |  |  | 22200 years | 10 years |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in Shares) |  | 10,714 |  |  | 149,704 | 25,815 |  |
Stock Issued During Period, Shares, Restricted Stock Award, Gross (in Shares) |  |  | 9.70 |  | 30,930 | 20,508 | 25,176 |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Exercise Price (in Dollars per share) |  | $ 15.89 | $ 1,500,000 |  |  |  |  | $ 12.67
Share-based Compensation |  |  |  |  | 694,000 | 503,000 | 595,000 |
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition |  |  |  |  | 5 years |  |  |
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized |  |  |  |  | 1.3 |  |  |
Allocated Share-based Compensation Expense, Net of Tax |  |  |  |  | 694,000 | 503,000 | 594,000 |
Employee Service Share-based Compensation, Tax Benefit Realized from Exercise of Stock Options |  |  |  |  | 451,000 | 327,000 | 386,000 |
Effective Income Tax Rate, Continuing Operations |  |  |  |  | 35.00% | 35.00% | 35.00% |
Proceeds from Stock Options Exercised |  |  |  |  | 66,000 | 43,000 | 692,000 |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in Shares) |  |  |  |  |  |  | 334,046 |
Restricted Stock [Member] |  |  |  |  |  |  |  |
Share-based Compensation |  |  |  |  | 327,000 | 170,000 |  |
Warrant [Member] |  |  |  |  |  |  |  |
Class Of Warrant Or Right Term Of Warrants Or Rights |  |  |  |  | 10 years |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per Item) |  |  |  |  | 1.50 |  |  |
Class Of Warrant Or Rights, Period From Which Warrants Or Rights Exercisable |  |  |  |  | 54 months |  |  |
Class of Warrant or Right, Outstanding (in Shares) |  |  |  |  | 1 |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in Shares) |  |  |  |  | 322,661 |  |  |
One Warrant [Member] |  |  |  |  |  |  |  |
Class Of Warrant Or Rights, Period From Which Warrants Or Rights Exercisable |  |  |  |  | 42 months |  |  |
Total [Member] |  |  |  |  |  |  |  |
Stock Repurchase Program, Authorized Amount | $ 10,000,000 |  |  |  |  |  |  |
Minimum [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period |  |  |  |  | 3 years |  |  |
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition |  |  |  |  | 2 years 36 days |  |  |
Maximum [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period |  |  |  |  | 5 years |  |  |
2001 Plan [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares) |  |  |  |  | 1,000,000 |  |  |
Share Based Compensation Arrangement By Share Based Payment Award Term |  |  |  |  | 10 years |  |  |

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